2024-02-29
Perlite vs Vermiculite: What's the difference & which to choose?
Also known as "volcanic popcorn", Perlite is made of amorphous volcanic glass and is typically formed by the hydration of obsidian. It is a white granular material that is made by heating volcanic glass until it expands and ‘pops’, like popcorn. It is sterile, lightweight and has a neutral pH, so it’s very easy to work with.